/Engine/Plugins/Editor/ContentBrowser/ContentBrowserFileDataSource/Source/ContentBrowserFileDataSource/Public/ContentBrowserFileDataSource.h
Called when a file in a watched directory changes on disk
void OnDirectoryChanged ( const [TArray](API\Runtime\Core\Containers\TArray)< [FFileChangeData](API\Developer\DirectoryWatcher\FFileChangeData) > & InFileChanges, const [FString](API\Runtime\Core\Containers\FString) InFileMountPath, const [FString](API\Runtime\Core\Containers\FString) InFileMountDiskPath )